Im in a quiz right !

delivery company charges 10¢ per cubic inch to deliver a package. if a box is 9 inches long, 7 inches wide, and 4 inches deep, what will it cost to be delivered?

a. $25.20

b. $36.20

c. $28.00

d. $63.40

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

Maurice has 54 fewer comic books than rebecca. they have 130 comic books together .how many comic books are in maurices collection ? how many comic books are in rebeccas collection